petcock rebuild

[harrO]

I'm working on petcocks from a '69 steeltank. It's apparent the replacement 3 hole rubber washers are thinner (.011 in.)  than original. Will this be a problem or can I continue with the assembly?  Thanks for your attention...Harry

[Doug Bridges]

Harry
 there is different thickness gaskets, but even with the right gasket there has to be enough spring pressure to make them seal. It drove me crazy with one set I had. I took them apart and put them back together ten times before I figured it out. I found a spring of the same diameter at the local hardware store and cut a piece just the right size and it fixed the problem. I have seen no mention of the petcock springs being worn out before on this forum, But I can say for a fact that it was the problem with a set that I had.

Doug Bridges
73 Jackpiner
74 Rickman Zundapp
78 Suzuki PE175
82 XR200R

[harrO]

Doug...I guess what threw me were the three brass stubs positioned in the body of the petcock. They surely would scratch the rotating (lever) when using the thinner washer and cause more problems. Thanks for the tip on swapping out the spring but first I would have to shorten/grind those stubs. Do you recall the stubs I'm referring  to in any of your rebuilds? I'm sure they were absent on my first rebuild of another set. Thanks again for your input.  Harry

[bbeck3100]

call Domi Racer and ask for a set of Italian petcock rebuild gaskets. They are the right thickness and will work great. With these, the little brass stubs won't stick out.

[harrO]

Thanks bbeck for the lead..That may be the tip I need. HO

[tomale]

BBeck, Do you know if they make the gaskets for the large petcocks.. They look just like the petcocks on the Pentons but the gaskets are quite a bit larger...

Thom Green,Still crazy after all these years!
76' 250 MC5 (orginal owner)
74'250 hare scrambler (project)
74' 1/2 440 maico
78' 440 maico
72' cr125 Husky (project)
74' TM125 suzuki
93' RMx 250 suzuki

[harrO]

Thom...Try bevelheaven..They list a kit for the larger petcock. 17mm I think.  Harry

[tomale]

Thanks, I will check them out,

Thom Green,Still crazy after all these years!
76' 250 MC5 (orginal owner)
74'250 hare scrambler (project)
74' 1/2 440 maico
78' 440 maico
72' cr125 Husky (project)
74' TM125 suzuki
93' RMx 250 suzuki